--- trunk/SHAPES/visualizer.cpp	2004/06/24 19:06:47	1300
+++ trunk/SHAPES/visualizer.cpp	2004/06/25 18:33:17	1307
@@ -88,7 +88,7 @@ int main(int argc, char* argv[]){
 
         r = sqrt(x*x + y*y + z*z);
         costheta = z/r;
-        phi = atan(y/x);
+        phi = atan2(y,x);
 
         sigmaShape = shape->getSigmaAt(costheta, phi);
         sShape = shape->getSAt(costheta, phi);